Repotting guide

When & how to repot Creeping New Zealand Cranesbill (Geranium sessiliflorum)

Also called Creeping New Zealand Cranesbill, Dwarf Cranesbill, Bronze Cranesbill.

More about creeping new zealand cranesbill

About Creeping New Zealand Cranesbill

Geranium sessiliflorum · also called Creeping New Zealand Cranesbill, Dwarf Cranesbill · flowering

Geranium sessiliflorum is a low, mat-forming perennial native to New Zealand and southern South America, grown primarily for its distinctive small, dark bronze-to-black-purple scalloped leaves rather than its tiny white flowers. The popular cultivar subsp. novae-zelandiae 'Nigricans' is the most widely grown form and requires full sun to develop and hold its striking leaf colour. It suits rock gardens, the front of sunny borders, and container edges. True Geranium species are non-toxic to cats and dogs per ASPCA guidance.

Mature size: 10–15 cm tall and 20–30 cm wide.

Watch for — Crown rot in wet winters: The compact low crown is susceptible to rotting in persistently waterlogged or wet conditions; grow in raised beds or containers with gritty compost and ensure winter drainage is excellent, particularly on UK clay soils.

How to tell creeping new zealand cranesbill needs repotting

Repotting on a calendar is less reliable than reading the plant. For creeping new zealand cranesbill, watch for these signs:

Roots growing out of the drainage holes, or the rootball lifting the plant proud of the rim.
Soil that has shrunk away from the pot sides and no longer holds water.
The pot is unstable because the plant has grown top-heavy.
Old, compacted, broken-down mix that stays wet too long — for a succulent that is a rot risk, so refresh it even if the pot size is fine.

For the underlying biology of a pot-bound root system and why it stalls a plant, see our guide to spotting and fixing a root-bound plant.

How often to repot creeping new zealand cranesbill

Every 2–3 years, into bone-dry mix. Creeping New Zealand Cranesbill's growth habit — low, mat-forming, semi-evergreen to evergreen perennial spreading by short stolons. — sets the pace. Geranium sessiliflorum is a low, mat-forming perennial native to New Zealand and southern South America, grown primarily for its distinctive small, dark bronze-to-black-purple scalloped leaves rather than its tiny white flowers. The popular cultivar subsp. novae-zelandiae 'Nigricans' is the most widely grown form and requires full sun to develop and hold its striking leaf colour. It suits rock gardens, the front of sunny borders, and container edges. True Geranium species are non-toxic to cats and dogs per ASPCA guidance.

What size pot to step creeping new zealand cranesbill up to

Use a pot only one size up — or even the same pot with fresh gritty mix if the roots have room. Creeping New Zealand Cranesbill stores water and rots in a large pot of slow-drying soil. A tight terracotta pot that dries fast is far safer than a generous plastic one. Never up-pot a succulent by several sizes.

Not sure of the exact diameter? Our pot size calculator takes the current pot and root spread and tells you the right next size — it deliberately recommends a single step up, never a big jump.

The best time of year to repot creeping new zealand cranesbill

Spring or summer, while creeping new zealand cranesbill is in active growth and warm, is best — roots recover fastest then, and the plant is not sitting in cool damp soil. Avoid repotting a succulent in winter dormancy.

Step-by-step: repotting creeping new zealand cranesbill

Repot dry. Do not water creeping new zealand cranesbill for several days first. Working with dry roots and dry mix dramatically lowers the rot risk for a succulent.
Pick a snug, fast-draining pot. Choose terracotta one size up at most, with a drainage hole. Have gritty well-drained, gritty or sandy loam of low to moderate fertility ready.
Tip it out and clean the roots. Slide the plant out, crumble off the old soil, and trim any black, mushy or dead roots with clean snips.
Pot into dry mix. Set creeping new zealand cranesbill at its original depth in dry gritty mix, firming gently. Do not bury the stem deeper than it was.
Wait a week before watering. Leave it completely dry and out of harsh sun for about 7 days so any damaged roots callus. Only then water lightly.

Aftercare

Keep creeping new zealand cranesbill completely dry and out of fierce sun for about a week so any nicked roots callus before they meet moisture; watering a freshly repotted succulent is the classic way to rot it. Then resume the normal lean, dry rhythm. Do not fertilise for about 3 weeks — fresh mix already carries nutrients and feeding freshly disturbed roots scorches them.

The right soil mix for creeping new zealand cranesbill

Creeping New Zealand Cranesbill wants well-drained, gritty or sandy loam of low to moderate fertility. Sharp drainage is non-negotiable; plant in a raised bed, rock garden pocket, or container with a gritty mix. Rich fertile soils reduce colour intensity and produce weak leafy growth. Always use fresh mix when you repot — reusing old, broken-down soil reintroduces the compaction and poor drainage you are repotting to fix.

Repotting creeping new zealand cranesbill — frequently asked questions

How often should you repot creeping new zealand cranesbill?

Every 2–3 years, into bone-dry mix for creeping new zealand cranesbill. Repot creeping new zealand cranesbill every 2–3 years into a snug pot of well-drained, gritty or sandy loam of low to moderate fertility, ideally in spring or summer. Let it sit in dry soil and do not water for about a week afterwards so any nicked roots can callus. Over-potting and watering straight away is what rots succulents.

What size pot does creeping new zealand cranesbill need?

When is the best time of year to repot creeping new zealand cranesbill?

Should you water creeping new zealand cranesbill after repotting?

No — not straight away. Repot creeping new zealand cranesbill into dry mix and wait about a week before the first watering so any damaged roots callus over. Watering a freshly repotted succulent is the single most common way to rot one.

Should you fertilise creeping new zealand cranesbill after repotting?

Not immediately. Wait about 3 weeks after repotting creeping new zealand cranesbill. Fresh mix already contains nutrients, and feeding freshly cut or disturbed roots burns them. Resume your normal feeding routine once you see new growth.